US2624671A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ferritic chromium steels
Assignee: Union Carbide Corp
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Filing: 1951-01-19
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Granted: 1953-01-06
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Expires: 1971-01-19
Abstract
No abstract record available.
Inventors
- 👤 William O Binder
- 👤 Franks Russell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:52
CPC Classifications
C; C22; C22C; C22C38/00; C22C38/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
98 words
A FERRITIC CHROMIUM STEEL CONTAINING 20% TO 40% CHROMIUM, UP TO 3% NICKEL UP TO 3% COBALT UP TO 2% COPPER, UP TO 3% MOLYBDENUM, UP TO 3% TUNGSTEN, THE REMAINDER, EXCEPT FOR INCIDENTAL IMPURITIES, BEING IRON, CARBON AND NITROGEN, THE SUM OF THE CARBON AND NITROGEN CONTENTS FOR A SELECTED CHROMIUM CONTENT BEING NO GREATER THAN THE VALUE DETERMINED BY THE INTERSECTION OF THE PLOT OF THE SELECTED CHROMIUM CONTENT WITH THE CURVE AB OF THE DRAWING, SAID STEEL HAVING IN THE ANNEALED CONDITION AN IZOD IMPACT STRENGTH OF AT LEAST 18 FOOT POUNDS AT ROOM TEMPERATURE.
Claim 2
Dependent Claim
98 words
A FERRITIC CHROMIUM STEEL CONTAINING 20% TO 40% CHROMIUM, UP TO 3% NICKEL UP TO 3% COBALT UP TO 2% COPPER, UP TO 3% MOLYBDENUM, UP TO 3% TUNGSTEN, THE REMAINDER, EXCEPT FOR INCIDENTAL IMPURITIES, BEING IRON, CARBON AND NITROGEN, THE SUM OF THE CARBON AND NITROGEN CONTENTS FOR A SELECTED CHROMIUM CONTENT BEING NO GREATER THAN THE VALUE DETERMINED BY THE INTERSECTION OF THE PLOT OF THE SELECTED CHROMIUM CONTENT WITH THE CURVE AB OF THE DRAWING, SAID STEEL HAVING IN THE ANNEALED CONDITION AN IZOD IMPACT STRENGTH OF AT LEAST 18 FOOT POUNDS AT ROOM TEMPERATURE.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-01-06 | 1956-07-07 | 1957-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-01-06 | 1960-07-07 | 1961-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-01-06 | 1964-07-07 | 1965-01-06 | $7700.00 | Window Closed / Lapsed |